John was piloting a plane behind a car but was never able to overtake it. Why?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

What kind of band never plays music?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

During which month do people sleep the least?

What goes up but never comes down?

How could a baby fall out of a twenty-story building onto the ground and live?

You can see it everyday, But cannot touch it at will. What is it?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?